add target "_blank" when click on github button at component's info

[pedronauck]

Hi,

I think that is better open a new tab when I click in github button than open in the same tab :smile_cat:

[rexxars]

I disagree, respectfully. I feel it should be up to the user if they want to open a link in the same or in a new tab, which is why I've left it this way.

Thanks for contributing, though!